Aligned magnetic insulating feature
AssigneeSeagate Technology LLC
InventorThomas Roy Boonstra
Life of this patent
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Abstract
Various apparatus and associated method embodiments are generally directed to a magnetic stack positioned on an air bearing surface (ABS) and biased to a predetermined magnetization by a bias magnet. The bias magnet can be separated from the magnetic stack and at least one magnetic shield by a self-aligned magnetic insulating feature that is comprised of first and second insulating layers.
Claims18
An apparatus comprising a magnetic stack extending from an air bearing surface (ABS) to a rear surface, the magnetic stack separated from a magnetic shield by a self-aligned insulating feature separated from the ABS, contacting a top surface of the magnetic stack, and positioned between the rear surface of the magnetic stack and the ABS, the self-aligned insulating feature comprising of a first insulating material extending no farther from the ABS than the rear surface of the magnetic stack, a second insulating material contacting the first insulating material and extending around a rear bias magnet and into a reduced thickness portion of the magnetic shield to separate the magnetic shield and magnetic stack from the bias magnet.
A sensor comprising:
- a magnetic stack disposed between first and second shields on an air bearing surface (ABS), the magnetic stack extending from the ABS to a rear surface, the first and second shields comprising first and second transition regions separated from the ABS and positioned between the rear surface of the magnetic stack and the ABS, respectively;
- and
- means for aligning the first and second transition regions along a plane parallel to the ABS and between the ABS and the rear surface of the magnetic stack, the means for aligning comprising first and second insulating materials that contact and occupy the first transition region in a reduced thickness portion of the first shield.
A data reader comprising:
- a magnetic stack disposed between first and second shields on an air bearing surface (ABS), the magnetic stack having top and bottom surfaces extending from the ABS to a rear surface distal the ABS, each shield comprising a transition region separated from the ABS and positioned between the rear surface of the magnetic stack and the ABS and aligned along a first plane parallel to the ABS, a first transition region of the first shield comprising a first insulating material contacting the top surface of the magnetic stack and extending no farther from the ABS than the rear surface of the magnetic stack, a second transition region of the second shield comprising a second insulating material contacting the bottom surface of the magnetic stack and extending beyond the rear surface of the magnetic stack, a third insulating material extending around a biasing magnet to contact the first insulating material and separate the magnetic stack, first shield, and second shield from the biasing magnet.
Dependencies are inferred from the claim text.